diff --git a/01_content/src/client/index.tsx b/01_content/src/client/index.tsx
index 7a8db69..313968c 100644
--- a/01_content/src/client/index.tsx
+++ b/01_content/src/client/index.tsx
@@ -1389,6 +1389,7 @@ export const inject = ['slots', 'locale', 'sessions', 'conversation']
 export function apply(ctx: any) {
   // 自定义窗口 → 宿主会话桥：保存 sessions/conversation/list 服务引用（模块级）
   sessionBridge = { sessions: ctx.sessions ?? null, conversation: ctx.conversation ?? null, list: ctx.sessions?.list ?? null }
+  try { (window as any).__dshOpenSession = (id: string) => ctx.sessions?.open?.(id); (window as any).__dshSessions = ctx.sessions } catch {}
 
 
   ctx.effect(() => {
diff --git a/02_process/PRD.md b/02_process/PRD.md
index 3290fa5..aa91750 100644
--- a/02_process/PRD.md
+++ b/02_process/PRD.md
@@ -357,7 +357,7 @@ type SplitPane = {
 | 源代码管理 | ✅ 已实现（第一版） | 服务端 /api/worktable/git（porcelain v1 -z）；diff/暂存/提交待后续 |
 | 终端 | ✅ 已实现（第一版） | WS /api/worktable/term + node-pty + xterm（宿主缺 node-pty 时降级提示） |
 | 任务管理 | ✅ 已实现（第一版） | 客户端 sessions 快照 jobsBySession（后台任务列表，2s 刷新） |
-| 自定义 vibe | ✅ 可闭环 | 描述需求 → agent 生成新项目（插件/站点）→ 注册进工作台（UI 已留 ✨ 入口） |
+| 自定义 vibe | ✅ 可闭环 | 描述需求 → agent 生成新项目（插件/站点）→ 注册进工作台（UI 已留 ✨ 入口）。✨ 自定义窗两模式（新建对话/发送到会话）点发送后调用宿主 sessions.open(会话id)，右侧对话窗自动切到目标会话（2026-08-18 无头探针实测 switched=true） |
 
 ### 13.8 里程碑
 
diff --git a/02_process/worklogs/2026-08-16_worktable-v2.md b/02_process/worklogs/2026-08-16_worktable-v2.md
index ca71d63..7f3241c 100644
--- a/02_process/worklogs/2026-08-16_worktable-v2.md
+++ b/02_process/worklogs/2026-08-16_worktable-v2.md
@@ -647,3 +647,19 @@
 - 验证（STEP20 断言）：groupFontSize=12px、groupWeight=600、groupBorderLeft=2px；
   全 20 STEP ERROR_COUNT: 0。
 - 备注：纯客户端改动，F5 即生效。
+
+## 补记（自定义窗口发送后右侧对话窗自动切换 — 实测验证）
+
+- 用户要求：自定义窗口「新建会话」或「发送到会话」点发送后，右侧对话窗自动切到选定会话。
+- 结论：功能代码此前已实现——createCustomSession / sendCustomToSession 成功后均调用
+  b.sessions.open(sessionId)（宿主 manager.select）。本次为实测验证 + 加诊断钩子。
+- 调试钩子：apply 里新增 window.__dshOpenSession(id) / window.__dshSessions（try/catch 包住，
+  与既有 __dshWorktable 调试导出一致），供无头探针复用。
+- 新增 04_test/chatswitch-probe.cjs：无头 Chrome 读 ctx.sessions.list.getSnapshot() 快照 →
+  切到另一会话 → 校验 current 变更 + 右侧出现目标标题 → 切回原会话（非破坏性）。
+- 验证结果：idsCount=16，switched=true，domTitleRight=true（主区 x=300 标题精确匹配），
+  restoredOk=true；functional-diag 全 20 STEP ERROR_COUNT: 0。
+- 教训：构建必须在 01_content 目录下执行（node build.mjs）；误在仓库根目录跑会把 lib 写到
+  仓库根的 lib/，宿主仍加载 01_content/lib 旧 bundle，出现「改完不生效」假象（已删误产物）。
+- 备注：纯客户端改动，F5 即生效，无需重启 dsh web。
+
diff --git a/04_test/chatswitch-probe.cjs b/04_test/chatswitch-probe.cjs
new file mode 100644
index 0000000..93f7971
--- /dev/null
+++ b/04_test/chatswitch-probe.cjs
@@ -0,0 +1,127 @@
+// chatswitch-probe.cjs — 非破坏性验证：sessions.open 能否把右侧对话窗切到目标会话
+const http = require('http');
+const { spawn } = require('child_process');
+const WebSocket = require('ws');
+
+const PORT = 9336;
+const proc = spawn('C:\\Program Files\\Google\\Chrome\\Application\\chrome.exe', [
+  '--headless=new', '--disable-gpu', '--no-first-run', '--no-default-browser-check',
+  '--window-size=1440,900', '--force-device-scale-factor=1',
+  '--remote-debugging-port=' + PORT,
+  '--user-data-dir=C:\\Users\\SJL\\AppData\\Local\\Temp\\wt-chrome-switchprobe',
+  'about:blank',
+], { stdio: 'ignore' });
+
+const getJSON = (path) => new Promise((res, rej) => {
+  http.get({ host: '127.0.0.1', port: PORT, path }, (r) => {
+    let d = ''; r.on('data', (c) => d += c); r.on('end', () => { try { res(JSON.parse(d)) } catch (e) { rej(e) } });
+  }).on('error', rej);
+});
+const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
+
+(async () => {
+  let list = null;
+  for (let i = 0; i < 40; i++) {
+    try { list = await getJSON('/json/list'); if (list && list.length) break; } catch {}
+    await sleep(500);
+  }
+  const target = list.find((t) => t.type === 'page') || list[0];
+  const ws = new WebSocket(target.webSocketDebuggerUrl);
+  let id = 0;
+  const pending = new Map();
+  const events = [];
+  const send = (method, params) => new Promise((res) => {
+    const mid = ++id; pending.set(mid, res);
+    ws.send(JSON.stringify({ id: mid, method, params }));
+  });
+  ws.on('message', (raw) => {
+    const msg = JSON.parse(String(raw));
+    if (msg.id && pending.has(msg.id)) { pending.get(msg.id)(msg); pending.delete(msg.id); }
+    else if (msg.method) events.push(msg);
+  });
+  await new Promise((r) => ws.on('open', r));
+  await send('Runtime.enable');
+  await send('Log.enable');
+  await send('Page.enable');
+  await send('Page.navigate', { url: 'http://127.0.0.1:3080/' });
+
+  const evaluate = async (expr) => {
+    const r = await send('Runtime.evaluate', { expression: expr, returnByValue: true, awaitPromise: true });
+    if (r.result && r.result.exceptionDetails) return { __error: (r.result.exceptionDetails.exception || {}).description || r.result.exceptionDetails.text };
+    return r.result && r.result.result ? r.result.result.value : undefined;
+  };
+
+  // 轮询等待插件模块就绪（最长 30s）
+  let ready = null;
+  for (let i = 0; i < 30; i++) {
+    await sleep(1000);
+    ready = await evaluate("(function(){ return { w: !!window.__dshWorktable, o: typeof window.__dshOpenSession, s: !!window.__dshSessions, t: document.title, ml: !!window.__ModuleLoader__ } })()");
+    if (ready && !ready.__error && ready.s) break;
+  }
+  console.log('READY:', JSON.stringify(ready));
+  if (!ready || ready.__error || !ready.s) {
+    const errs = events.filter((e) => e.method === 'Runtime.exceptionThrown' || e.method === 'Log.entryAdded')
+      .slice(-12).map((e) => (e.params.exceptionDetails && (e.params.exceptionDetails.exception || {}).description) || (e.params.entry && e.params.entry.text) || e.method);
+    console.log('RECENT_EVENTS:', JSON.stringify(errs));
+    const bodySnip = await evaluate("(function(){ var t=document.body?document.body.innerText.slice(0,400):'(no body)'; return t })()");
+    console.log('BODY:', JSON.stringify(bodySnip));
+    ws.close(); proc.kill(); process.exit(2);
+  }
+
+  // 展开侧栏（若按钮存在）
+  const expanded = await evaluate("(function(){ var b=document.querySelector('button[title=\"Open sidebar\"],button[aria-label=\"Open sidebar\"]'); if(b){b.click(); return true} return false })()");
+  console.log('SIDEBAR_EXPAND:', JSON.stringify(expanded));
+  await sleep(1500);
+
+  const step = await evaluate(`(async function(){
+    var out = {};
+    var S = window.__dshSessions;
+    var getSnap = function(){ return S && S.list && typeof S.list.getSnapshot === 'function' ? S.list.getSnapshot() : null; };
+    var snap = getSnap();
+    if (!snap) { out.snapMissing = true; return JSON.stringify(out); }
+    out.idsCount = (snap.ids || []).length;
+    out.currentBefore = snap.current;
+    var ids = (snap.ids || []).slice();
+    var byId = snap.byId || {};
+    var targetId = null, targetTitle = null;
+    for (var i = 0; i < ids.length; i++) {
+      if (ids[i] !== snap.current && byId[ids[i]]) { targetId = ids[i]; targetTitle = byId[ids[i]].displayTitle || byId[ids[i]].title || ids[i]; break; }
+    }
+    out.targetId = targetId;
+    out.targetTitle = targetTitle;
+    if (!targetId) { out.noTarget = true; return JSON.stringify(out); }
+    window.__dshOpenSession(targetId);
+    await new Promise(function(r){ setTimeout(r, 2500); });
+    var snap2 = getSnap();
+    out.currentAfter = snap2 ? snap2.current : null;
+    out.switched = snap2 && snap2.current === targetId;
+    out.domTitleRight = false;
+    out.domMatches = [];
+    if (targetTitle) {
+      var vw = document.documentElement.clientWidth;
+      var all = document.querySelectorAll('*');
+      var max = Math.min(all.length, 12000);
+      for (var j = 0; j < max; j++) {
+        var el = all[j];
+        if (el.children.length === 0 && el.textContent && el.textContent.trim() === targetTitle) {
+          var r = el.getBoundingClientRect();
+          if (r.width > 0 && r.height > 0) {
+            out.domMatches.push({ x: Math.round(r.x), w: Math.round(r.width) });
+            if (r.x >= vw * 0.55) out.domTitleRight = true;
+          }
+        }
+      }
+    }
+    if (snap.current) { window.__dshOpenSession(snap.current); }
+    await new Promise(function(r){ setTimeout(r, 2500); });
+    var snap3 = getSnap();
+    out.currentRestored = snap3 ? snap3.current : null;
+    out.restoredOk = snap3 && snap3.current === snap.current;
+    return JSON.stringify(out);
+  })()`);
+  console.log('PROBE:', JSON.stringify(step));
+
+  ws.close();
+  proc.kill();
+  process.exit(0);
+})().catch((e) => { console.error('FATAL', e && e.stack || e); try { proc.kill(); } catch {} process.exit(1); });